Jackalope (American) – Rabbit with antlers Jack Frost - Personified of ice, winter and snow Jack-In-Irons (English) – Malevolent giant Jack-o'-lantern (Medieval folklore) – Vegetal lantern Jaculus (Medieval Bestiaries) – Winged serpent or small dragon Jake the Alligator Man (American) – Alligator human hybrid. Jaroszek (Polish) – Field Demon Jasconius (Medieval folklore) – Island-sized fish Jasy Jaterei (Guaraní) – Nature guardian and bogeyman Jatayu (Hindu mythology) – Vulture demigod Jaud (Slavic) – Vampirised premature baby Jenglot (Java) – Vampiric little people Jengu (Sawa) – Water spirit Jentil (Basque) – Megalith-building giant Jenu (Mi'kmaq) – Anthropophagous giant Jerff (Swedish) – Gluttonous dog-cat-fox hybrid Jersey Devil (American) – Demonic dragon or flying demon who was given birth to by an American living in New Jersey Jian (Chinese) – One-eyed, one-winged bird who requires a mate for survival Jiangshi (Chinese) – Life-draining, reanimated corpse Jiaolong (Chinese) – Dragon Jibakurei (Japanese) – Spirit that protects a specific place Jievaras (Lithuanian) – House spirit Jikininki (Japanese) – Corpse-eating ghost Jinn (Arabian, Islamic) – Spiritual creatures; genii Jipijka'm (Mi'kmaq) – Underwater horned snake; lives in lakes and eats humans Jiufeng (Chinese) – Nine-headed bird worshiped by ancient natives in Hubei Province. Jiu tou niao (Chinese) – Nine-headed, demonic bird Jobar (Tuareg) – Giant carnivorous monster. Jogah (Haudenosaunee) – Little people nature spirit Jörmungandr (Norse) – Sea serpent Jorōgumo (Japanese) – Spider woman Jotai (Japanese) – Animated folding screen cloth Jötunn (Norse) – Gigantic nature spirits Jujak (Korean) – Bird Jumbee (Guyanese) – Malevolent spirit